LEA-6 / NEO-6 / MAX-6 - Hardware Integration Manual
UBX-14054794
Production Information
Design-in
Page 42 of 85
–For the correct calculation of the micro strip impedance, one does not only need to consider the distance
between the top and the first inner layer but also the distance between the micro strip and the adjacent GND
plane on the same layer
Use the Coplanar Waveguide model for the calculation of the micro strip.
Figure 39: Micro strip on a 2-layer board (Agilent AppCAD Coplanar Waveguide)
Figure 39 shows an example of a 2-layer FR4 board with 1.6 mm thickness and a 35 µm (1 ounce) copper
cladding. The thickness of the micro strip is comprised of the cladding (35µm) plus the plated copper (typically
25µm). Figure 40 is an example of a multi layer FR4 board with 18 µm (½ ounce) cladding and 180 µ dielectric
between layer 1 and 2.
Figure 40: Micro strip on a multi layer board (Agilent AppCAD Coplanar Waveguide)
2.6
Antenna and antenna supervisor
u-blox 6 modules receive L1 band signals from GPS and GALILEO satellites at a nominal frequency of
1575.42 MHz. The RF signal is connected to the
RF_IN
pin.
u-blox 6 modules can be connected to passive or active antennas.
For u-blox 6 receivers, the total preamplifier gain (minus cable and interconnect losses) must not exceed
50 dB. Total noise figure should be below 3 dB.
u-blox 6 Technology supports short circuit protection of the active antenna and an active antenna supervisor
circuit (open and short circuit detection). For further information refer to
Section 2.6.2).
